1. Heat the butter in a sauce pan. Cook and stir onion for 3-4 minutes. Add the garlic, then the rice and a pinch of black pepper. Then add the asparagus cut in small pieces, cook and stir until the rice is highly toasted (around 5 minutes).
2. Pour hot chicken stock into the rice mixture divided into 3 to 4 amounts.
3. Once the liquid is completely absorbed, add the cheese, the fresh cream and then the lemon zest.